The FBI on Wednesday searched the suburban Boston home of a man convicted of extortion in the 1982 Tylenol tampering killings, saying they had reopened the investigation into the seven unsolved murders because of advances in forensic technology and new tips to law enforcement.

Wednesday's announcement was the first indication that authorities hadn't given up on solving the notorious murders.

The FBI said federal, state and local authorities are conducting "a complete review of all evidence" compiled over the years, but it was unclear whether authorities were close to charging anyone.

After news reports of the search of the residence of longtime suspect James William Lewis, the FBI issued a brief statement saying the renewed probe was prompted in part by publicity surrounding the 25th anniversary of the killings and the resulting tips.